SEO Impact of High Volume Vertical and Horizontal Internal Linking

[jhariani]

Hello Everyone - I maintain a site with over a million distinct pages of content. Each piece of content can be thought of like a node in graph database or an entity. While there is a bit of natural hierarchy, every single entity can be related to one or more other entities. The conceptual structure of the entities like so:

• Agency - A top level business unit ( ~100 pages/urls)
• Office - A lower level business unit, part of an Agency ( ~5,000 pages/urls)
• Person - Someone who works in one or more Offices ( ~80,000 pages/urls)
• Project - A thing one or more People is managing ( ~750,000 pages/urls)
• Vendor - A company that is working on one or more Projects ( ~250,000 pages/urls)
• Category - A descriptive entity, defining one or more Projects ( ~1,000 pages/urls)

Each of these six entities has a unique (url) and content. For each page/url, there are internal links to each of the related entity pages. For example, if a user is looking at a Project page/url, there will be an internal link to one or more Agencies, Offices, People, Vendors, and Categories. Also, a Project will have links to similar Projects. This same theory holds true for all other entities as well. People pages link to their related Agencies, Offices, Projects, Vendors, etc, etc. If you start to do the math, there are tons of internal links leading to pages with tons of internal links leading to pages with tons of internal links.

While our users enjoy the ability to navigate this world according to these relationships, I am curious if we should force a more strict hierarchy for SEO purposes. Essentially, does it make sense to "nofollow" all of the horizontal internal links for a given entity page/url? For search engine indexing purposes, we have legit sitemaps that give a simple vertical hierarchy...but I am curious if all of this internal linking should be hidden via nofollow...?

Thanks in advance!

[MichaelC-15022]

No, keep doing it the way you're doing it.  That's perfectly good link juice flowing between those pages.

Breadcrumbs are a nice way to communicate the hierarchy to Google--not because they're breadcrumbs, but simply because of their nature: all pages at each level contribute link juice back up to each of its ancestor pages.  A child page has the least internal links; its parent has more; its grandparent even more; etc.